Still going.

(CBS/AP) — Some 20 cars have been torched and four people detained in a second night of violence in suburbs west of Paris.

France’s interior minister said Sunday that the incidents overnight targeted the town of Elancourt.

Police union official said on BFM television that about 50 assailants were involved, some firing weapons and a gasoline bomb at police.

The night before, about 250 people hurling projectiles clashed with police firing tear gas in the nearby town of Trappes in apparent protest over the enforcement of France’s ban on Islamic face veils. Five people were injured and six detained in the violence, authorities said Saturday.

The interior minister urged calm and dialogue, insisting on both the need for public order and respect for France’s Muslims. The incident in the town of Trappes on Friday night reflected sporadic tensions between police upholding France’s strict policies of secularism and those who accuse authorities of discriminating against France’s No. 2 religion.

A few garbage dumpsters in the area were torched and a bus shelter shattered in the Trappes unrest. Spent tear gas capsules lay on the road Saturday near the police station at the center of the violence.